makeint.h@ 3208

最後變更在這個檔案從3208是 3138,由 bird 提交於 7 年前
Imported make 4.2.1 (2e55f5e4abdc0e38c1d64be703b446695e70b3b6) from https://git.savannah.gnu.org/git/make.git.
屬性 svn:eol-style 設為 `native`
檔案大小: 22.1 KB

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1	/* Miscellaneous global declarations and portability cruft for GNU Make.
2	Copyright (C) 1988-2016 Free Software Foundation, Inc.
3	This file is part of GNU Make.
4
5	GNU Make is free software; you can redistribute it and/or modify it under the
6	terms of the GNU General Public License as published by the Free Software
7	Foundation; either version 3 of the License, or (at your option) any later
8	version.
9
10	GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
11	WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12	A PARTICULAR PURPOSE. See the GNU General Public License for more details.
13
14	You should have received a copy of the GNU General Public License along with
15	this program. If not, see <http://www.gnu.org/licenses/>. */
16
17	/* We use <config.h> instead of "config.h" so that a compilation
18	using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
19	(which it would do because makeint.h was found in $srcdir). */
20	#include <config.h>
21	#undef HAVE_CONFIG_H
22	#define HAVE_CONFIG_H 1
23
24	/* Specify we want GNU source code. This must be defined before any
25	system headers are included. */
26
27	#define _GNU_SOURCE 1
28
29	/* AIX requires this to be the first thing in the file. */
30	#if HAVE_ALLOCA_H
31	# include <alloca.h>
32	#else
33	# ifdef _AIX
34	#pragma alloca
35	# else
36	# if !defined(__GNUC__) && !defined(WINDOWS32)
37	# ifndef alloca /* predefined by HP cc +Olibcalls */
38	char *alloca ();
39	# endif
40	# endif
41	# endif
42	#endif
43
44	/* Disable assert() unless we're a maintainer.
45	Some asserts are compute-intensive. */
46	#ifndef MAKE_MAINTAINER_MODE
47	# define NDEBUG 1
48	#endif
49
50	/* Include the externally-visible content.
51	Be sure to use the local one, and not one installed on the system.
52	Define GMK_BUILDING_MAKE for proper selection of dllexport/dllimport
53	declarations for MS-Windows. */
54	#ifdef WINDOWS32
55	# define GMK_BUILDING_MAKE
56	#endif
57	#include "gnumake.h"
58
59	#ifdef CRAY
60	/* This must happen before #include <signal.h> so
61	that the declaration therein is changed. */
62	# define signal bsdsignal
63	#endif
64
65	/* If we're compiling for the dmalloc debugger, turn off string inlining. */
66	#if defined(HAVE_DMALLOC_H) && defined(__GNUC__)
67	# define __NO_STRING_INLINES
68	#endif
69
70	#include <sys/types.h>
71	#include <sys/stat.h>
72	#include <signal.h>
73	#include <stdio.h>
74	#include <ctype.h>
75
76	#ifdef HAVE_SYS_TIMEB_H
77	/* SCO 3.2 "devsys 4.2" has a prototype for 'ftime' in <time.h> that bombs
78	unless <sys/timeb.h> has been included first. */
79	# include <sys/timeb.h>
80	#endif
81	#if TIME_WITH_SYS_TIME
82	# include <sys/time.h>
83	# include <time.h>
84	#else
85	# if HAVE_SYS_TIME_H
86	# include <sys/time.h>
87	# else
88	# include <time.h>
89	# endif
90	#endif
91
92	#include <errno.h>
93
94	#ifndef errno
95	extern int errno;
96	#endif
97
98	#ifdef __VMS
99	/* In strict ANSI mode, VMS compilers should not be defining the
100	VMS macro. Define it here instead of a bulk edit for the correct code.
101	*/
102	# ifndef VMS
103	# define VMS
104	# endif
105	#endif
106
107	#ifdef HAVE_UNISTD_H
108	# include <unistd.h>
109	/* Ultrix's unistd.h always defines _POSIX_VERSION, but you only get
110	POSIX.1 behavior with 'cc -YPOSIX', which predefines POSIX itself! */
111	# if defined (_POSIX_VERSION) && !defined (ultrix) && !defined (VMS)
112	# define POSIX 1
113	# endif
114	#endif
115
116	/* Some systems define _POSIX_VERSION but are not really POSIX.1. */
117	#if (defined (butterfly) \|\| defined (__arm) \|\| (defined (__mips) && defined (_SYSTYPE_SVR3)) \|\| (defined (sequent) && defined (i386)))
118	# undef POSIX
119	#endif
120
121	#if !defined (POSIX) && defined (_AIX) && defined (_POSIX_SOURCE)
122	# define POSIX 1
123	#endif
124
125	#ifndef RETSIGTYPE
126	# define RETSIGTYPE void
127	#endif
128
129	#ifndef sigmask
130	# define sigmask(sig) (1 << ((sig) - 1))
131	#endif
132
133	#ifndef HAVE_SA_RESTART
134	# define SA_RESTART 0
135	#endif
136
137	#ifdef HAVE_VFORK_H
138	# include <vfork.h>
139	#endif
140
141	#ifdef HAVE_LIMITS_H
142	# include <limits.h>
143	#endif
144	#ifdef HAVE_SYS_PARAM_H
145	# include <sys/param.h>
146	#endif
147
148	#ifndef PATH_MAX
149	# ifndef POSIX
150	# define PATH_MAX MAXPATHLEN
151	# endif
152	#endif
153	#ifndef MAXPATHLEN
154	# define MAXPATHLEN 1024
155	#endif
156
157	#ifdef PATH_MAX
158	# define GET_PATH_MAX PATH_MAX
159	# define PATH_VAR(var) char var[PATH_MAX]
160	#else
161	# define NEED_GET_PATH_MAX 1
162	# define GET_PATH_MAX (get_path_max ())
163	# define PATH_VAR(var) char *var = alloca (GET_PATH_MAX)
164	unsigned int get_path_max (void);
165	#endif
166
167	#ifndef CHAR_BIT
168	# define CHAR_BIT 8
169	#endif
170
171	#ifndef USHRT_MAX
172	# define USHRT_MAX 65535
173	#endif
174
175	/* Nonzero if the integer type T is signed.
176	Use <= to avoid GCC warnings about always-false expressions. */
177	#define INTEGER_TYPE_SIGNED(t) ((t) -1 <= 0)
178
179	/* The minimum and maximum values for the integer type T.
180	Use ~ (t) 0, not -1, for portability to 1's complement hosts. */
181	#define INTEGER_TYPE_MINIMUM(t) \
182	(! INTEGER_TYPE_SIGNED (t) ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))
183	#define INTEGER_TYPE_MAXIMUM(t) (~ (t) 0 - INTEGER_TYPE_MINIMUM (t))
184
185	#ifndef CHAR_MAX
186	# define CHAR_MAX INTEGER_TYPE_MAXIMUM (char)
187	#endif
188
189	#ifdef STAT_MACROS_BROKEN
190	# ifdef S_ISREG
191	# undef S_ISREG
192	# endif
193	# ifdef S_ISDIR
194	# undef S_ISDIR
195	# endif
196	#endif /* STAT_MACROS_BROKEN. */
197
198	#ifndef S_ISREG
199	# define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
200	#endif
201	#ifndef S_ISDIR
202	# define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
203	#endif
204
205	#ifdef VMS
206	# include <fcntl.h>
207	# include <types.h>
208	# include <unixlib.h>
209	# include <unixio.h>
210	# include <perror.h>
211	/* Needed to use alloca on VMS. */
212	# include <builtins.h>
213
214	extern int vms_use_mcr_command;
215	extern int vms_always_use_cmd_file;
216	extern int vms_gnv_shell;
217	extern int vms_comma_separator;
218	extern int vms_legacy_behavior;
219	extern int vms_unix_simulation;
220	#endif
221
222	#ifndef __attribute__
223	/* This feature is available in gcc versions 2.5 and later. */
224	# if __GNUC__ < 2 \|\| (__GNUC__ == 2 && __GNUC_MINOR__ < 5) \|\| __STRICT_ANSI__
225	# define __attribute__(x)
226	# endif
227	/* The __-protected variants of 'format' and 'printf' attributes
228	are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */
229	# if __GNUC__ < 2 \|\| (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
230	# define __format__ format
231	# define __printf__ printf
232	# endif
233	#endif
234	#define UNUSED __attribute__ ((unused))
235
236	#if defined (STDC_HEADERS) \|\| defined (__GNU_LIBRARY__)
237	# include <stdlib.h>
238	# include <string.h>
239	# define ANSI_STRING 1
240	#else /* No standard headers. */
241	# ifdef HAVE_STRING_H
242	# include <string.h>
243	# define ANSI_STRING 1
244	# else
245	# include <strings.h>
246	# endif
247	# ifdef HAVE_MEMORY_H
248	# include <memory.h>
249	# endif
250	# ifdef HAVE_STDLIB_H
251	# include <stdlib.h>
252	# else
253	void *malloc (int);
254	void realloc (void , int);
255	void free (void *);
256
257	void abort (void) __attribute__ ((noreturn));
258	void exit (int) __attribute__ ((noreturn));
259	# endif /* HAVE_STDLIB_H. */
260
261	#endif /* Standard headers. */
262
263	/* These should be in stdlib.h. Make sure we have them. */
264	#ifndef EXIT_SUCCESS
265	# define EXIT_SUCCESS 0
266	#endif
267	#ifndef EXIT_FAILURE
268	# define EXIT_FAILURE 1
269	#endif
270
271	#ifndef ANSI_STRING
272
273	/* SCO Xenix has a buggy macro definition in <string.h>. */
274	#undef strerror
275	#if !defined(__DECC)
276	char *strerror (int errnum);
277	#endif
278
279	#endif /* !ANSI_STRING. */
280	#undef ANSI_STRING
281
282	#if HAVE_INTTYPES_H
283	# include <inttypes.h>
284	#endif
285	#if HAVE_STDINT_H
286	# include <stdint.h>
287	#endif
288	#define FILE_TIMESTAMP uintmax_t
289
290	#if !defined(HAVE_STRSIGNAL)
291	char *strsignal (int signum);
292	#endif
293
294	/* ISDIGIT offers the following features:
295	- Its arg may be any int or unsigned int; it need not be an unsigned char.
296	- It's guaranteed to evaluate its argument exactly once.
297	NOTE! Make relies on this behavior, don't change it!
298	- It's typically faster.
299	POSIX 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
300	only '0' through '9' are digits. Prefer ISDIGIT to isdigit() unless
301	it's important to use the locale's definition of 'digit' even when the
302	host does not conform to POSIX. */
303	#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
304
305	/* Test if two strings are equal. Is this worthwhile? Should be profiled. */
306	#define streq(a, b) \
307	((a) == (b) \|\| \
308	((a) == (b) && (*(a) == '\0' \|\| !strcmp ((a) + 1, (b) + 1))))
309
310	/* Test if two strings are equal, but match case-insensitively on systems
311	which have case-insensitive filesystems. Should only be used for
312	filenames! */
313	#ifdef HAVE_CASE_INSENSITIVE_FS
314	# define patheq(a, b) \
315	((a) == (b) \
316	\|\| (tolower((unsigned char)(a)) == tolower((unsigned char)(b)) \
317	&& (*(a) == '\0' \|\| !strcasecmp ((a) + 1, (b) + 1))))
318	#else
319	# define patheq(a, b) streq(a, b)
320	#endif
321
322	#define strneq(a, b, l) (strncmp ((a), (b), (l)) == 0)
323
324	#if defined(__GNUC__) \|\| defined(ENUM_BITFIELDS)
325	# define ENUM_BITFIELD(bits) :bits
326	#else
327	# define ENUM_BITFIELD(bits)
328	#endif
329
330	/* Handle gettext and locales. */
331
332	#if HAVE_LOCALE_H
333	# include <locale.h>
334	#else
335	# define setlocale(category, locale)
336	#endif
337
338	#include <gettext.h>
339
340	#define _(msgid) gettext (msgid)
341	#define N_(msgid) gettext_noop (msgid)
342	#define S_(msg1,msg2,num) ngettext (msg1,msg2,num)
343
344	/* This is needed for getcwd() and chdir(), on some W32 systems. */
345	#if defined(HAVE_DIRECT_H)
346	# include <direct.h>
347	#endif
348
349	#ifdef WINDOWS32
350	# include <fcntl.h>
351	# include <malloc.h>
352	# define pipe(_p) _pipe((_p), 512, O_BINARY)
353	# define kill(_pid,_sig) w32_kill((_pid),(_sig))
354	/* MSVC and Watcom C don't have ftruncate. */
355	# if defined(_MSC_VER) \|\| defined(__WATCOMC__)
356	# define ftruncate(_fd,_len) _chsize(_fd,_len)
357	# endif
358	/* MinGW64 doesn't have _S_ISDIR. */
359	# ifndef _S_ISDIR
360	# define _S_ISDIR(m) S_ISDIR(m)
361	# endif
362
363	void sync_Path_environment (void);
364	int w32_kill (pid_t pid, int sig);
365	int find_and_set_default_shell (const char *token);
366
367	/* indicates whether or not we have Bourne shell */
368	extern int no_default_sh_exe;
369
370	/* is default_shell unixy? */
371	extern int unixy_shell;
372
373	/* We don't have a preferred fixed value for LOCALEDIR. */
374	# ifndef LOCALEDIR
375	# define LOCALEDIR NULL
376	# endif
377
378	/* Include only the minimal stuff from windows.h. */
379	# define WIN32_LEAN_AND_MEAN
380	#endif /* WINDOWS32 */
381
382	#define ANY_SET(_v,_m) (((_v)&(_m)) != 0)
383	#define NONE_SET(_v,_m) (! ANY_SET ((_v),(_m)))
384
385	#define MAP_NUL 0x0001
386	#define MAP_BLANK 0x0002
387	#define MAP_NEWLINE 0x0004
388	#define MAP_COMMENT 0x0008
389	#define MAP_SEMI 0x0010
390	#define MAP_EQUALS 0x0020
391	#define MAP_COLON 0x0040
392	#define MAP_PERCENT 0x0080
393	#define MAP_PIPE 0x0100
394	#define MAP_DOT 0x0200
395	#define MAP_COMMA 0x0400
396
397	/* These are the valid characters for a user-defined function. */
398	#define MAP_USERFUNC 0x2000
399	/* This means not only a '$', but skip the variable reference. */
400	#define MAP_VARIABLE 0x4000
401	/* The set of characters which are directory separators is OS-specific. */
402	#define MAP_DIRSEP 0x8000
403
404	#ifdef VMS
405	# define MAP_VMSCOMMA MAP_COMMA
406	#else
407	# define MAP_VMSCOMMA 0x0000
408	#endif
409
410	#define MAP_SPACE (MAP_BLANK\|MAP_NEWLINE)
411
412	/* Handle other OSs.
413	To overcome an issue parsing paths in a DOS/Windows environment when
414	built in a unix based environment, override the PATH_SEPARATOR_CHAR
415	definition unless being built for Cygwin. */
416	#if defined(HAVE_DOS_PATHS) && !defined(__CYGWIN__)
417	# undef PATH_SEPARATOR_CHAR
418	# define PATH_SEPARATOR_CHAR ';'
419	# define MAP_PATHSEP MAP_SEMI
420	#elif !defined(PATH_SEPARATOR_CHAR)
421	# if defined (VMS)
422	# define PATH_SEPARATOR_CHAR (vms_comma_separator ? ',' : ':')
423	# define MAP_PATHSEP (vms_comma_separator ? MAP_COMMA : MAP_SEMI)
424	# else
425	# define PATH_SEPARATOR_CHAR ':'
426	# define MAP_PATHSEP MAP_COLON
427	# endif
428	#elif PATH_SEPARATOR_CHAR == ':'
429	# define MAP_PATHSEP MAP_COLON
430	#elif PATH_SEPARATOR_CHAR == ';'
431	# define MAP_PATHSEP MAP_SEMI
432	#elif PATH_SEPARATOR_CHAR == ','
433	# define MAP_PATHSEP MAP_COMMA
434	#else
435	# error "Unknown PATH_SEPARATOR_CHAR"
436	#endif
437
438	#define STOP_SET(_v,_m) ANY_SET(stopchar_map[(unsigned char)(_v)],(_m))
439
440	#define ISBLANK(c) STOP_SET((c),MAP_BLANK)
441	#define ISSPACE(c) STOP_SET((c),MAP_SPACE)
442	#define NEXT_TOKEN(s) while (ISSPACE (*(s))) ++(s)
443	#define END_OF_TOKEN(s) while (! STOP_SET (*(s), MAP_SPACE\|MAP_NUL)) ++(s)
444
445	#if defined(HAVE_SYS_RESOURCE_H) && defined(HAVE_GETRLIMIT) && defined(HAVE_SETRLIMIT)
446	# define SET_STACK_SIZE
447	#endif
448	#ifdef SET_STACK_SIZE
449	# include <sys/resource.h>
450	extern struct rlimit stack_limit;
451	#endif
452
453	#include <glob.h>
454
455	#define NILF ((floc *)0)
456
457	#define CSTRLEN(_s) (sizeof (_s)-1)
458	#define STRING_SIZE_TUPLE(_s) (_s), CSTRLEN(_s)
459
460	/* The number of bytes needed to represent the largest integer as a string. */
461	#define INTSTR_LENGTH CSTRLEN ("18446744073709551616")
462
463	#define DEFAULT_TTYNAME "true"
464	#ifdef HAVE_TTYNAME
465	# define TTYNAME(_f) ttyname (_f)
466	#else
467	# define TTYNAME(_f) DEFAULT_TTYNAME
468	#endif
469
470
471
472
473	/* Specify the location of elements read from makefiles. */
474	typedef struct
475	{
476	const char *filenm;
477	unsigned long lineno;
478	unsigned long offset;
479	} floc;
480
481	const char *concat (unsigned int, ...);
482	void message (int prefix, size_t length, const char *fmt, ...)
483	__attribute__ ((__format__ (__printf__, 3, 4)));
484	void error (const floc flocp, size_t length, const char fmt, ...)
485	__attribute__ ((__format__ (__printf__, 3, 4)));
486	void fatal (const floc flocp, size_t length, const char fmt, ...)
487	__attribute__ ((noreturn, __format__ (__printf__, 3, 4)));
488
489	#define O(_t,_a,_f) _t((_a), 0, (_f))
490	#define OS(_t,_a,_f,_s) _t((_a), strlen (_s), (_f), (_s))
491	#define OSS(_t,_a,_f,_s1,_s2) _t((_a), strlen (_s1) + strlen (_s2), \
492	(_f), (_s1), (_s2))
493	#define OSSS(_t,_a,_f,_s1,_s2,_s3) _t((_a), strlen (_s1) + strlen (_s2) + strlen (_s3), \
494	(_f), (_s1), (_s2), (_s3))
495	#define ON(_t,_a,_f,_n) _t((_a), INTSTR_LENGTH, (_f), (_n))
496	#define ONN(_t,_a,_f,_n1,_n2) _t((_a), INTSTR_LENGTH*2, (_f), (_n1), (_n2))
497
498	#define OSN(_t,_a,_f,_s,_n) _t((_a), strlen (_s) + INTSTR_LENGTH, \
499	(_f), (_s), (_n))
500	#define ONS(_t,_a,_f,_n,_s) _t((_a), INTSTR_LENGTH + strlen (_s), \
501	(_f), (_n), (_s))
502
503	#define OUT_OF_MEM() O (fatal, NILF, _("virtual memory exhausted"))
504
505	void die (int) __attribute__ ((noreturn));
506	void pfatal_with_name (const char *) __attribute__ ((noreturn));
507	void perror_with_name (const char , const char );
508	#define xstrlen(_s) ((_s)==NULL ? 0 : strlen (_s))
509	void *xmalloc (unsigned int);
510	void *xcalloc (unsigned int);
511	void xrealloc (void , unsigned int);
512	char xstrdup (const char );
513	char xstrndup (const char , unsigned int);
514	char find_next_token (const char , unsigned int );
515	char next_token (const char );
516	char end_of_token (const char );
517	void collapse_continuations (char *);
518	char lindex (const char , const char *, int);
519	int alpha_compare (const void , const void );
520	void print_spaces (unsigned int);
521	char find_percent (char );
522	const char find_percent_cached (const char *);
523
524	#ifndef NO_ARCHIVES
525	int ar_name (const char *);
526	void ar_parse_name (const char , char , char *);
527	int ar_touch (const char *);
528	time_t ar_member_date (const char *);
529
530	typedef long int (ar_member_func_t) (int desc, const char mem, int truncated,
531	long int hdrpos, long int datapos,
532	long int size, long int date, int uid,
533	int gid, unsigned int mode,
534	const void *arg);
535
536	long int ar_scan (const char archive, ar_member_func_t function, const void arg);
537	int ar_name_equal (const char name, const char mem, int truncated);
538	#ifndef VMS
539	int ar_member_touch (const char arname, const char memname);
540	#endif
541	#endif
542
543	int dir_file_exists_p (const char , const char );
544	int file_exists_p (const char *);
545	int file_impossible_p (const char *);
546	void file_impossible (const char *);
547	const char dir_name (const char );
548	void print_dir_data_base (void);
549	void dir_setup_glob (glob_t *);
550	void hash_init_directories (void);
551
552	void define_default_variables (void);
553	void undefine_default_variables (void);
554	void set_default_suffixes (void);
555	void install_default_suffix_rules (void);
556	void install_default_implicit_rules (void);
557
558	void build_vpath_lists (void);
559	void construct_vpath_list (char pattern, char dirpath);
560	const char vpath_search (const char file, FILE_TIMESTAMP *mtime_ptr,
561	unsigned int* vpath_index, unsigned int* path_index);
562	int gpath_search (const char *file, unsigned int len);
563
564	void construct_include_path (const char **arg_dirs);
565
566	void user_access (void);
567	void make_access (void);
568	void child_access (void);
569
570	char strip_whitespace (const char begpp, const char *endpp);
571
572	void show_goal_error (void);
573
574	/* String caching */
575	void strcache_init (void);
576	void strcache_print_stats (const char *prefix);
577	int strcache_iscached (const char *str);
578	const char strcache_add (const char str);
579	const char strcache_add_len (const char str, unsigned int len);
580
581	/* Guile support */
582	int guile_gmake_setup (const floc *flocp);
583
584	/* Loadable object support. Sets to the strcached name of the loaded file. */
585	typedef int (load_func_t)(const floc flocp);
586	int load_file (const floc flocp, const char *filename, int noerror);
587	void unload_file (const char *name);
588
589	/* We omit these declarations on non-POSIX systems which define _POSIX_VERSION,
590	because such systems often declare them in header files anyway. */
591
592	#if !defined (__GNU_LIBRARY__) && !defined (POSIX) && !defined (_POSIX_VERSION) && !defined(WINDOWS32)
593
594	long int atol ();
595	# ifndef VMS
596	long int lseek ();
597	# endif
598
599	# ifdef HAVE_GETCWD
600	# if !defined(VMS) && !defined(__DECC)
601	char *getcwd ();
602	# endif
603	# else
604	char *getwd ();
605	# define getcwd(buf, len) getwd (buf)
606	# endif
607
608	#endif /* Not GNU C library or POSIX. */
609
610	#if !HAVE_STRCASECMP
611	# if HAVE_STRICMP
612	# define strcasecmp stricmp
613	# elif HAVE_STRCMPI
614	# define strcasecmp strcmpi
615	# else
616	/* Create our own, in misc.c */
617	int strcasecmp (const char s1, const char s2);
618	# endif
619	#endif
620
621	#if !HAVE_STRNCASECMP
622	# if HAVE_STRNICMP
623	# define strncasecmp strnicmp
624	# elif HAVE_STRNCMPI
625	# define strncasecmp strncmpi
626	# else
627	/* Create our own, in misc.c */
628	int strncasecmp (const char s1, const char s2, int n);
629	# endif
630	#endif
631
632	#define OUTPUT_SYNC_NONE 0
633	#define OUTPUT_SYNC_LINE 1
634	#define OUTPUT_SYNC_TARGET 2
635	#define OUTPUT_SYNC_RECURSE 3
636
637	/* Non-GNU systems may not declare this in unistd.h. */
638	extern char **environ;
639
640	extern const floc *reading_file;
641	extern const floc **expanding_var;
642
643	extern unsigned short stopchar_map[];
644
645	extern int just_print_flag, silent_flag, ignore_errors_flag, keep_going_flag;
646	extern int print_data_base_flag, question_flag, touch_flag, always_make_flag;
647	extern int env_overrides, no_builtin_rules_flag, no_builtin_variables_flag;
648	extern int print_version_flag, print_directory_flag, check_symlink_flag;
649	extern int warn_undefined_variables_flag, trace_flag, posix_pedantic;
650	extern int not_parallel, second_expansion, clock_skew_detected;
651	extern int rebuilding_makefiles, one_shell, output_sync, verify_flag;
652
653	extern const char *default_shell;
654
655	/* can we run commands via 'sh -c xxx' or must we use batch files? */
656	extern int batch_mode_shell;
657
658	/* Resetting the command script introduction prefix character. */
659	#define RECIPEPREFIX_NAME ".RECIPEPREFIX"
660	#define RECIPEPREFIX_DEFAULT '\t'
661	extern char cmd_prefix;
662
663	extern unsigned int job_slots;
664	#ifndef NO_FLOAT
665	extern double max_load_average;
666	#else
667	extern int max_load_average;
668	#endif
669
670	#ifdef WINDOWS32
671	extern char *program;
672	#else
673	extern const char *program;
674	#endif
675
676	#ifdef VMS
677	const char vms_command (const char argv0);
678	const char vms_progname (const char argv0);
679
680	void vms_exit (int);
681	# define _exit(foo) vms_exit(foo)
682	# define exit(foo) vms_exit(foo)
683
684	extern char *program_name;
685
686	void
687	set_program_name (const char *arv0);
688
689	int
690	need_vms_symbol (void);
691
692	int
693	create_foreign_command (const char command, const char image);
694
695	int
696	vms_export_dcl_symbol (const char name, const char value);
697
698	int
699	vms_putenv_symbol (const char *string);
700
701	void
702	vms_restore_symbol (const char *string);
703
704	#endif
705
706	void remote_setup (void);
707	void remote_cleanup (void);
708	int start_remote_job_p (int);
709	int start_remote_job (char , char , int, int , int , int *);
710	int remote_status (int , int , int *, int);
711	void block_remote_children (void);
712	void unblock_remote_children (void);
713	int remote_kill (int id, int sig);
714	void print_variable_data_base (void);
715	void print_vpath_data_base (void);
716
717	extern char *starting_directory;
718	extern unsigned int makelevel;
719	extern char version_string, remote_description, *make_host;
720
721	extern unsigned int commands_started;
722
723	extern int handling_fatal_signal;
724
725
726	#ifndef MIN
727	#define MIN(_a,_b) ((_a)<(_b)?(_a):(_b))
728	#endif
729	#ifndef MAX
730	#define MAX(_a,_b) ((_a)>(_b)?(_a):(_b))
731	#endif
732
733
734	#define MAKE_SUCCESS 0
735	#define MAKE_TROUBLE 1
736	#define MAKE_FAILURE 2
737
738	/* Set up heap debugging library dmalloc. */
739
740	#ifdef HAVE_DMALLOC_H
741	#include <dmalloc.h>
742	#endif
743
744	#ifndef initialize_main
745	# ifdef __EMX__
746	# define initialize_main(pargc, pargv) \
747	{ _wildcard(pargc, pargv); _response(pargc, pargv); }
748	# else
749	# define initialize_main(pargc, pargv)
750	# endif
751	#endif
752
753	#ifdef __EMX__
754	# if !defined chdir
755	# define chdir _chdir2
756	# endif
757	# if !defined getcwd
758	# define getcwd _getcwd2
759	# endif
760
761	/* NO_CHDIR2 causes make not to use _chdir2() and _getcwd2() instead of
762	chdir() and getcwd(). This avoids some error messages for the
763	make testsuite but restricts the drive letter support. */
764	# ifdef NO_CHDIR2
765	# warning NO_CHDIR2: usage of drive letters restricted
766	# undef chdir
767	# undef getcwd
768	# endif
769	#endif
770
771	#ifndef initialize_main
772	# define initialize_main(pargc, pargv)
773	#endif
774
775
776	/* Some systems (like Solaris, PTX, etc.) do not support the SA_RESTART flag
777	properly according to POSIX. So, we try to wrap common system calls with
778	checks for EINTR. Note that there are still plenty of system calls that
779	can fail with EINTR but this, reportedly, gets the vast majority of
780	failure cases. If you still experience failures you'll need to either get
781	a system where SA_RESTART works, or you need to avoid -j. */
782
783	#define EINTRLOOP(_v,_c) while (((_v)=_c)==-1 && errno==EINTR)
784
785	/* While system calls that return integers are pretty consistent about
786	returning -1 on failure and setting errno in that case, functions that
787	return pointers are not always so well behaved. Sometimes they return
788	NULL for expected behavior: one good example is readdir() which returns
789	NULL at the end of the directory--and _doesn't_ reset errno. So, we have
790	to do it ourselves here. */
791
792	#define ENULLLOOP(_v,_c) do { errno = 0; (_v) = _c; } \
793	while((_v)==0 && errno==EINTR)

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